Black Cold Drawn Seamless Square Steel Pipe

Black Cold Drawn Seamless Square Steel Pipe

Black cold drawn seamless square steel pipe Introduction Black cold drawn seamless square steel pipe is made of strip steel after process processing. To change the square pipe: generally, the strip is unpacked, flat, crimped, welded into a round tube, and then rolled into a square tube and then...
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Product Details

Black cold drawn seamless square steel pipe Introduction

Black cold drawn seamless square steel pipe is made of strip steel after process processing. To change the square pipe: generally, the strip is unpacked, flat, crimped, welded into a round tube, and then rolled into a square tube and then cut to the required length.When the square steel tube is cold drawn, the plastic deformation occurs through a certain shape and size mold. At present, the production method of drawing can be roughly divided into three kinds: reducing tube drawing, subtract the outer wall tube drawing and reduction of wall tube drawing, cold drawing。    

Black cold drawn seamless square steel pipe technical parameters and details

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Material

Size

Q345B

84*84*5.6

Q345B

70*70*8.9

Q345B

73*73*4.9

Q345B

19*19*0.8

Q345B

89*89*4.6

Q345B

24*24*2.1

Production process

Raw material – annealing for material of 45#, 27SiMn, 25Mn – Acid cleaning – parkerizing & Saponifying – cold drawn – leveling – saw off bad section – stress relieving – leveling – inspection – oiled plated - packing

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